Answer
Circumference $= 41.125 \pi ft $
$\approx 129.1325 ft$
Work Step by Step
Circumference = $2\pi r$
Diameter $(d) = 41.125 feet$
$d = 2r$
Circumference = $2r \pi = d\pi = 41.125\pi ft$
Using 3.14 for $\pi$
Circumference $= 41.125 \times 3.14 \approx129.1325 ft$